I'm thinking about getting this grill with the side fire box. I'm thinking about using the side fire box for smoke flavor only, relying on gas to control temps (cooking offset). My other option would be to get the four burner gas grill (4001, I think), but would not have the space for a side fire box if I did that and I definitely want some capacity for smoke flavor. How hot does the 3001 get when using only one burner on low? Can I realistically use a few coals and some wood chunks in the side fire box and expect to get smoke flavor without relying on it as the main heat source? If I got the larger model without the side fire box, would I be able to get decent smoke flavor by using a typical smoker box over the live burner when offset cooking? Also, since I live in an apartment now, I would need to move the grill 5 to 10 feet every time I want to use it. Are these grills up to the task?